A fuel pump assembly with automatic speed regulation

Abstract

The invention discloses a fuel pump assembly with automatic speed adjustment, which belongs to the technical field of automobile accessories. A pump core is fixedly installed on the inner wall of a fuel tank, one end of the pump core is fixedly connected to an oil inlet pipe, a threaded head is fixedly sleeved on the surface of the oil inlet pipe, a coarse filter sleeve is threadedly connected to the surface of the threaded head, an oil inlet is opened on the other end of the coarse filter sleeve, an elastic pad is sleeved on the inner wall of the coarse filter sleeve, one surface of the elastic pad is in contact with and connected to a surface of a filter plate, a filter screen is arranged at the center of the filter plate, a buffer sleeve arranged on the fuel pump assembly with automatic speed adjustment has the function of buffering the release force, can prevent the impact force generated when the pressure relief valve releases pressure from piercing the fuel tank, has the function of anti-puncture, and prolongs the service life of the fuel pump assembly, and the filter plate and the coarse filter sleeve have the function of rapid disassembly and assembly, and the coarse filter sleeve is easy to assemble and disassemble with the oil inlet pipe, which greatly improves the assembly speed of the fuel pump assembly.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, and more particularly to a fuel pump assembly capable of automatically adjusting the rotation speed. Background Art

[0002] The fuel pump draws fuel from the fuel tank and delivers the fuel to the injector in the engine compartment through a delivery pipeline. The injector sprays the fuel under a certain pressure into the combustion chamber for combustion.

[0003] At present, the pressure relief valves provided in the existing fuel pump assemblies with automatic speed adjustment mostly do not have anti-puncture function. When the pressure is released during use, the discharged fuel with a certain impact force will continue to impact the inner wall of the fuel tank, which may cause the fuel tank to be damaged and leak over time, shortening the service life of the fuel tank and posing certain safety hazards. In addition, the coarse filter screen provided is mostly welded and fixed to the pump core, which is time-consuming to assemble, thereby reducing the assembly efficiency of the fuel pump assembly. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a fuel pump assembly with automatic speed adjustment. The buffer sleeve arranged in the fuel pump assembly with automatic speed adjustment has the function of buffering the release force, which can prevent the impact force generated when the pressure relief valve releases pressure from piercing the fuel tank. It has an anti-puncture function and extends the service life of the fuel pump assembly. The filter plate and the coarse filter sleeve have the function of rapid disassembly and combination, and the coarse filter sleeve is easy to assemble and disassemble with the oil inlet pipe, which greatly improves the assembly speed of the fuel pump assembly.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A fuel pump assembly with automatic speed adjustment comprises a fuel tank, a pump core is fixedly installed on the inner wall of the fuel tank, one end of the pump core is fixedly connected to an oil inlet pipe, a threaded head is fixedly sleeved on the surface of the oil inlet pipe, a coarse filter sleeve is threadedly connected to the surface of the threaded head, an oil inlet is opened at the other end of the coarse filter sleeve, an elastic pad is sleeved on the inner wall of the coarse filter sleeve, one surface of the elastic pad is in contact with and connected to a surface of a filter plate, a filter screen is provided at the center of the filter plate, the other end of the pump core is fixedly connected to a fine filter via a pipeline, one end of the fine filter is fixedly connected to a pressure relief valve via a pipeline, and the pressure relief valve A pressure relief pipe is arranged on one side, a sealing sleeve is slidably sleeved on the surface of the pressure relief pipe, a buffer sleeve is fixedly sleeved on the surface of the sealing sleeve, a mounting groove is arranged in the buffer sleeve, an anti-puncture pad is fixedly connected to the inner wall of the mounting groove, the buffer sleeve arranged in the fuel pump assembly with automatic speed adjustment has the function of buffering the relief force, which can prevent the impact force generated when the pressure relief valve releases pressure from piercing the fuel tank, has the anti-puncture function, and prolongs the service life of the fuel pump assembly, and the filter plate and the coarse filter sleeve have the function of rapid disassembly and combination, and the coarse filter sleeve is easy to assemble and disassemble with the oil inlet pipe, which greatly improves the assembly speed of the fuel pump assembly.

[0007] Furthermore, the cross-sectional shape of the threaded head is T-shaped, a sealing gasket is slidably sleeved on the surface of the threaded head, and one surface of the sealing gasket is in contact and connected with one end surface of the coarse filter sleeve.

[0008] Furthermore, the sealing gasket is made of elastic oil-resistant rubber, and the sealing gasket is in a state of compressed elastic force, and the elastic force enables the connecting end of the coarse filter sleeve to have the functions of sealing and loosening.

[0009] Furthermore, a spring is sleeved on the outer side of the pressure relief pipe, and one end of the spring is in contact with a limiting ring.

[0010] Furthermore, the inner wall of the limiting ring is fixedly sleeved with one end surface of the pressure relief pipe. When the spring is squeezed by the limiting ring, it has the effect of compressing the elastic force, and the elastic force has the effect of buffering the pressure relief force, thereby reducing the impact force generated by the pressure relief.

[0011] Furthermore, the elastic pad is in the shape of a ring and is made of elastic oil-resistant rubber. The elastic pad is in a state of compressed elastic force and has the functions of sealing and compressed elastic force, thereby improving the installation firmness and sealing of the filter.

[0012] Furthermore, a liquid outlet pipe is fixedly connected to one surface of the buffer sleeve.

[0013] Furthermore, one end of the liquid outlet pipe is trumpet-shaped, which can quickly discharge the fuel brought out by the pressure relief in the installation groove to avoid blockage that affects the pressure relief.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) The buffer sleeve provided in the present solution has the function of buffering the pressure relief force, which can prevent the impact force generated when the pressure relief valve releases pressure from piercing the fuel tank. It has the function of preventing puncture and prolonging the service life of the fuel pump assembly. In addition, the filter sheet and the coarse filter sleeve provided have the function of rapid disassembly and assembly, and the coarse filter sleeve is easy to assemble and disassemble with the oil inlet pipe, which greatly improves the assembly speed of the fuel pump assembly.

[0016] (2) The cross-sectional shape of the threaded head is T-shaped, and a sealing gasket is slidably sleeved on the surface of the threaded head. One surface of the sealing gasket is in contact and connected with one end surface of the coarse filter sleeve. The sealing gasket is made of elastic oil-resistant rubber. The sealing gasket is in a state of compressed elastic force. The elastic force enables the connection end of the coarse filter sleeve to have the functions of sealing and loosening.

[0017] (3) A spring is sleeved on the outer side of the pressure relief pipe, one end of the spring is in contact with a limit ring, the inner wall of the limit ring is fixedly sleeved on the surface of one end of the pressure relief pipe, when the spring is squeezed by the limit ring, it has the effect of compressing the elastic force, and the elastic force has the effect of buffering the pressure relief force, thereby reducing the impact force generated by the pressure relief.

[0018] (4) The elastic pad is in the shape of a ring and is made of elastic oil-resistant rubber. The elastic pad is in a state of compressed elastic force and has the functions of sealing and compressed elastic force, thereby improving the installation firmness and sealing of the filter.

[0019] (5) A liquid outlet pipe is fixedly connected to one surface of the buffer sleeve. One end of the liquid outlet pipe is trumpet-shaped, which can quickly discharge the fuel brought out by the pressure relief in the installation groove to avoid blockage and affect the pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the installation structure of the pressure relief valve and the buffer sleeve of the present invention;

[0022] Figure 3 It is a cross-sectional view of the installation structure of the pump core and the coarse filter sleeve of the present invention.

[0023] Description of the numbers in the figure:

[0024] 1 fuel tank, 2 pump core, 21 oil inlet pipe, 22 threaded head, 3 coarse filter sleeve, 31 oil inlet, 32 sealing gasket, 33 filter plate, 34 filter screen, 35 elastic pad, 4 fine filter, 5 pressure relief valve, 51 pressure relief pipe, 52 limit ring, 6 buffer sleeve, 61 installation groove, 62 anti-puncture pad, 63 sealing sleeve, 64 spring, 65 liquid outlet pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-3 , a fuel pump assembly with automatic speed regulation, including a fuel tank 1, see Figure 1-3 A pump core 2 is fixedly installed on the inner wall of the fuel tank 1. The fuel tank 1 is also provided with components such as a liquid level sensor and a pump controller, which belongs to the prior art. One end of the pump core 2 is fixedly connected with an oil inlet pipe 21, and the oil inlet pipe 21 is used to transport the fuel in the fuel tank 1 to the fine filter 4. A threaded head 22 is fixedly sleeved on the surface of the oil inlet pipe 21, and a coarse filter sleeve 3 is threadedly connected to the surface of the threaded head 22. The coarse filter sleeve 3 has the function of disassembling and assembling. An oil inlet 31 is opened at the other end of the coarse filter sleeve 3. An elastic pad 35 is sleeved on the inner wall of the coarse filter sleeve 3. One surface of the elastic pad 35 is in contact with and connected to one surface of a filter plate 33. A filter screen 34 is provided at the center of the filter plate 33. The filter screen 34 is used to filter larger impurities in the fuel. The other end of the pump core 2 One end is fixedly connected with a fine filter 4 through a pipeline. The fine filter 4 belongs to the prior art and is used to filter smaller impurities in the fuel. One end of the fine filter 4 is fixedly connected with a pressure relief valve 5 through a pipeline. The pressure relief valve 5 is a normally closed safety valve, which is used to discharge pressure exceeding the safety warning line and belongs to the prior art. A pressure relief pipe 51 is arranged on one side of the pressure relief valve 5. A sealing sleeve 63 is slidably sleeved on the surface of the pressure relief pipe 51. The material of the sealing sleeve 63 is wear-resistant and oil-resistant sealing rubber. A buffer sleeve 6 is fixedly sleeved on the surface of the sealing sleeve 63. An installation groove 61 is arranged in the buffer sleeve 6. An anti-puncture pad 62 is fixedly connected to the inner wall of the installation groove 61. The anti-puncture pad 62 can prevent the fuel with a certain impact force discharged from the pressure relief pipe 51 from piercing the inner wall of the buffer sleeve 6.

[0027] See also Figure 2 and 3 The cross-sectional shape of the threaded head 22 is T-shaped, and a sealing gasket 32 ​​is slidably sleeved on the surface of the threaded head 22. One surface of the sealing gasket 32 ​​is in contact and connected with one end face of the coarse filter sleeve 3. The sealing gasket 32 ​​is made of elastic oil-resistant rubber. The sealing gasket 32 ​​is in a state of compressed elastic force. The elastic force enables the connecting end of the coarse filter sleeve 3 to have the functions of sealing and loosening. A spring 64 is sleeved on the outer side of the pressure relief pipe 51, and one end of the spring 64 is in contact and connected with a limiting ring 52. The inner wall of the limiting ring 52 is fixedly sleeved with the surface of one end of the pressure relief pipe 51. When the spring 64 is squeezed by the limiting ring 52, it has the effect of compressing the elastic force. The elastic force has the effect of buffering the relief force, thereby reducing the impact force generated by the pressure relief.

[0028] See also Figure 2and 3 The elastic pad 35 is in the shape of a ring and is made of elastic oil-resistant rubber. The elastic pad 35 is in a state of compressed elastic force and has the functions of sealing and compressed elastic force, thereby improving the installation firmness and sealing of the filter 34. A liquid outlet pipe 65 is fixedly connected to one surface of the buffer sleeve 6. One end of the liquid outlet pipe 65 is trumpet-shaped, which can quickly discharge the fuel brought out by the pressure relief in the installation groove 61 to avoid blockage and affect the pressure relief.

[0029] When installing the coarse filter sleeve 3 of the fuel pump assembly with automatic speed regulation, the elastic pad 35 is firstly sleeved on the inner wall of the coarse filter sleeve 3, and then the filter sheet 33 is sleeved, and then one end of the coarse filter sleeve 3 is threadedly connected with the thread head 22 through a thread. At this time, one end of the oil inlet pipe 21 squeezes the filter sheet 33, so that the filter sheet 33 squeezes the elastic pad 35, and the elastic pad 35 forms a compression elastic force, which has the effect of sealing and preventing loosening. The filter sheet 33 and the coarse filter sleeve 3 have the function of rapid disassembly and assembly, and the coarse filter sleeve 3 is easy to assemble and disassemble with the oil inlet pipe 21, which greatly improves the fuel pump. The assembly speed of the assembly. When the fuel pump assembly needs to release pressure during use, the pressure relief pipe 51 discharges excessive pressure, and the pressure drives the fuel to impact on the surface of the anti-puncture pad 62 for buffering. At the same time, the impact force will push the buffer sleeve 6 to move the extrusion spring 64, and the spring 64 will buffer the impact force again. At this time, the discharged fuel falls into the installation groove 61 and is quickly discharged through the liquid outlet pipe 65. The buffer sleeve 6 has the function of buffering the release force, which can prevent the impact force generated by the pressure relief valve 5 when releasing pressure from piercing the fuel tank 1. It has the function of anti-puncture and extends the service life of the fuel pump assembly.

[0030] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fuel pump assembly with automatic speed adjustment, comprising a fuel tank (1), characterized in that: A pump core (2) is fixedly mounted on the inner wall of the fuel tank (1); one end of the pump core (2) is fixedly connected to an oil inlet pipe (21); a threaded head (22) is fixedly sleeved on the surface of the oil inlet pipe (21); a coarse filter sleeve (3) is threadedly connected to the surface of the threaded head (22); an oil inlet (31) is provided at the other end of the coarse filter sleeve (3); an elastic pad (35) is sleeved on the inner wall of the coarse filter sleeve (3); one surface of the elastic pad (35) is in contact with and connected to one surface of a filter sheet (33); a filter screen (34) is provided at the center of the filter sheet (33); the other end of the pump core (2) is fixedly connected to a fine filter (4) via a pipeline; one end of the fine filter (4) is fixedly connected to a pressure relief valve (5) via a pipeline; the pressure relief valve (5) A pressure relief pipe (51) is provided on one side thereof; a sealing sleeve (63) is slidably sleeved on the surface of the pressure relief pipe (51); a buffer sleeve (6) is fixedly sleeved on the surface of the sealing sleeve (63); a mounting groove (61) is provided in the buffer sleeve (6); an anti-puncture pad (62) is fixedly connected to the inner wall of the mounting groove (61); the cross-sectional shape of the threaded head (22) is T-shaped; a sealing pad (32) is slidably sleeved on the surface of the threaded head (22); one surface of the sealing pad (32) is in contact with and connected to one end surface of the coarse filter sleeve (3); a spring (64) is sleeved on the outer side of the pressure relief pipe (51); one end of the spring (64) is in contact with and connected to a limiting ring (52); the inner wall of the limiting ring (52) is fixedly sleeved to the surface of one end of the pressure relief pipe (51).

2. The fuel pump assembly with automatic speed adjustment according to claim 1, characterized in that: The sealing pad (32) is made of elastic oil-resistant rubber.

3. The fuel pump assembly with automatic speed adjustment according to claim 1, characterized in that: The elastic pad (35) is in the shape of a ring, and is made of elastic oil-resistant rubber.

4. The fuel pump assembly with automatic speed adjustment according to claim 1, characterized in that: A liquid outlet pipe (65) is fixedly connected to one surface of the buffer sleeve (6).

Images